So what exactly is that? Bach music on piano in quad/5.1? How does that work?
It's two editions of the same recording - pianist Christian Grøvlen performing the work of Bach.
The original edition features Stereo and 5 Channel DSD and DXD mixes using the DPA Microphones commonly used by 2L.
With the Sennheiser Special Edition, the album is available in Stereo and 4 Channel DSD and DXD using Sennheiser Microphones.
The discount allows listeners to buy both versions to compare the different microphones and mixes.
The album is a download only release.
Not available on disc (CD, SACD, BD Audio, etc.)
https://2l.nativedsd.com/albums/2L139SEN-bach-inside-polyphony-sennheiser-special-editionhttps://2l.nativedsd.com/albums/2L139-bach-inside-polyphony